Specific utility archives, such as worms-2_wmv-sync.7z , are distributed for fixing synchronization issues in older games like Worms 2 on Linux.
a-sync/7z-extra: 7-Zip Extra is a package of extra ... - GitHub sync.7z
In tools like chrlauncher , "sync.7z" is a standard filename for browser binaries used to update or synchronize the application. Specific utility archives, such as worms-2_wmv-sync